.g_header {
  position: flex;
  top: 0;
  left: 0;
  right: 0;
}
.g_bottom_btn {
  font-size: 16px;
  text-align: center;
  height: 44px;
  line-height: 44px;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 0;
  background: #2a6dfb;
  color: #fff;
}
.overlay_class {
  background-color: rgba(255, 255, 255, 0.7);
  top: 45px;
}

@supports (bottom: constant(safe-area-inset-top)) or
  (bottom: env(safe-area-inset-top)) {
  .iphonex {
    padding-top: constant(safe-area-inset-top); //为导航栏+状态栏的高度 88px
    padding-top: env(safe-area-inset-top); //为导航栏+状态栏的高度 88px
    padding-left: constant(safe-area-inset-left); //如果未竖屏时为0
    padding-left: env(safe-area-inset-left); //如果未竖屏时为0
    padding-right: constant(safe-area-inset-right); //如果未竖屏时为0
    padding-right: env(safe-area-inset-right); //如果未竖屏时为0
    padding-bottom: constant(safe-area-inset-bottom); //为底下圆弧的高度 34px
    padding-bottom: env(safe-area-inset-bottom); //为底下圆弧的高度 34px
  }
}
